Update vendors.

Former-commit-id: 55a30b9cbfe7c513dd13d709aa4552fe715c262b

vendor/underscore/underscore.js

@@ -1,6 +1,6 @@
-//     Underscore.js 1.4.3
+//     Underscore.js 1.4.4
 //     http://underscorejs.org
-//     (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc.
+//     (c) 2009-2013 Jeremy Ashkenas, DocumentCloud Inc.
 //     Underscore may be freely distributed under the MIT license.
 
 (function() {
@@ -64,7 +64,7 @@
   }
 
   // Current version.
-  _.VERSION = '1.4.3';
+  _.VERSION = '1.4.4';
 
   // Collection Functions
   // --------------------
@@ -236,10 +236,10 @@
   };
 
   // Convenience version of a common use case of `filter`: selecting only objects
-  // with specific `key:value` pairs.
-  _.where = function(obj, attrs) {
-    if (_.isEmpty(attrs)) return [];
-    return _.filter(obj, function(value) {
+  // containing specific `key:value` pairs.
+  _.where = function(obj, attrs, first) {
+    if (_.isEmpty(attrs)) return first ? void 0 : [];
+    return _[first ? 'find' : 'filter'](obj, function(value) {
       for (var key in attrs) {
         if (attrs[key] !== value[key]) return false;
       }
@@ -247,6 +247,12 @@
     });
   };
 
+  // Convenience version of a common use case of `find`: getting the first object
+  // containing specific `key:value` pairs.
+  _.findWhere = function(obj, attrs) {
+    return _.where(obj, attrs, true);
+  };
+
   // Return the maximum element or (element-based computation).
   // Can't optimize arrays of integers longer than 65,535 elements.
   // See: https://bugs.webkit.org/show_bug.cgi?id=80797
@@ -568,26 +574,23 @@
   // Function (ahem) Functions
   // ------------------
 
-  // Reusable constructor function for prototype setting.
-  var ctor = function(){};
-
   // Create a function bound to a given object (assigning `this`, and arguments,
-  // optionally). Binding with arguments is also known as `curry`.
-  // Delegates to **ECMAScript 5**'s native `Function.bind` if available.
-  // We check for `func.bind` first, to fail fast when `func` is undefined.
+  // optionally). Delegates to **ECMAScript 5**'s native `Function.bind` if
+  // available.
   _.bind = function(func, context) {
-    var args, bound;
     if (func.bind === nativeBind && nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
-    if (!_.isFunction(func)) throw new TypeError;
-    args = slice.call(arguments, 2);
-    return bound = function() {
-      if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments)));
-      ctor.prototype = func.prototype;
-      var self = new ctor;
-      ctor.prototype = null;
-      var result = func.apply(self, args.concat(slice.call(arguments)));
-      if (Object(result) === result) return result;
-      return self;
+    var args = slice.call(arguments, 2);
+    return function() {
+      return func.apply(context, args.concat(slice.call(arguments)));
+    };
+  };
+
+  // Partially apply a function by creating a version that has had some of its
+  // arguments pre-filled, without changing its dynamic `this` context.
+  _.partial = function(func) {
+    var args = slice.call(arguments, 1);
+    return function() {
+      return func.apply(this, args.concat(slice.call(arguments)));
     };
   };
 
@@ -1055,7 +1058,7 @@
   // If the value of the named property is a function then invoke it;
   // otherwise, return it.
   _.result = function(object, property) {
-    if (object == null) return null;
+    if (object == null) return void 0;
     var value = object[property];
     return _.isFunction(value) ? value.call(object) : value;
   };